Do the shifters you got from your friend fit in the ends of the drop bars?
When you replace the tires and tubes you've already spent $50.
I've been finding great wheel deals on Craigslist such as,
New Reynolds Alta Comp wheels with new Michelin Dynamic Sport tires and 9 speed cassette $100
Like new Bontrager SSR wheels with like new R7 plus tires and 9 speed cassete $125